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Chemistry Klemm
Unit 1
Question | Answer |
---|---|
What is chemistry? | the science that deals with all the materials and the changes they go through |
What is chemistry often called? | the central science |
What is the scientific method? | 1. Identify the problem 2. Form a hypothesis 3. test it |
What is a theory? | explains why something happens |
What is a law? | explains what happens |
What are the three systems of measurement? | SI, metric, and English |
What is mass is SI units? | kilograms |
What is length in SI units? | meters |
What is time in SI units? | seconds |
What is temperature in SI units? | Kalvin |
What unit is used for the volume of a liquid or gas? | milliliters |
What unit is used for the volume of a solid? | cm^3 |
What are the three types of zeros? | captive, leading, and trailing |
How do you find density? | mass/volume |
How do you find volume? | mass/density |
How do you find mass? | density x volume |
What is matter? | any physical substance that has mass |
What are two ways that matter can be changed? | physically and chemically |
What two properties does matter have? | physical and chemical |
What is an element? | the building blocks of matter. Can't be broken down |
What is a compound? | two or more elements mixed together. Compounds can be broken down by going through a chemical change |
What is a mixture? | any combination of elements and compounds |
What are two types of mixtures? | homogenous and heterogenous |
What is a pure substance? | elements of compounds |
How can we separate mixtures? | distillation and filtration |